用户名: 密码: 验证码:
可控源音频大地电磁法采集线耦合效应浅析
详细信息    查看官网全文
摘要
可控源音频大地电磁法(CSAMT)野外数据采集时,由于现场作业条件的限制,特别是南方植被茂密的山区,采集线之间很容易相互缠绕,有时为了提高作业效率,甚至把主机两侧的采集线捆绑在一起,这种方法虽然提高了工作效率,但却增加了采集线之间的耦合效应,进而影响到采集数据的质量和反演成果的准确性,本文结合工程实例设置对比试验浅析了采集线耦合效应的表现特征,在电场相位和阻抗相位方面表现为不同频点集中分布且随排列规律出现的中间上凸的锯齿形;在反演剖面上表现为与排列对应规律出现的浅层视电阻率等值线圆形闭合的低阻异常。通过多次改变线间距的对比试验,研究得出线间距大于20cm是控制电磁耦合效应的有效控制措施。
when collecting data in the wild with CSAMT, Due to the restriction of operating conditions, the collection line is very easy to mutually winding, Especially in the mountains in the south of China. Sometimes in order to improve the operating efficiency, the collection lines are bundled together. Although this method improves the work efficiency, But it increases the coupling effect between the lines, And then affect the accuracy of the quality of the collected data and the accuracy of the inversion results. In this paper, the performance characteristics of the coupling effect of the collection lines is analyzed with the comparison test of the engineering example. In the electric field phase and impedance phase, Different frequencys distribute concentratally and the middle upper Zigzag with the arrangement regularly; In the inversion section, the performance is the shallow apparent resistivity contour's circular closed low resistivity anomaly correspond with the arrangement regularly.
引文
1.张振宇,王大勇,雷达,等.CSAMT法接收系统中电磁耦合效应研究[J].物探与化探,2015,39(2):376-382.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700